220 OTOTYLOMYS. 
46. Ototylomys. 
he - M33 = 16. 
l BY 
Ototylomys Merr., Proc. Wash. Acad. Scien., HI, 1901, p. 561. 
Type Ototylomys phyllotis Merriam. 
Rat-like; ears large, thin, and naked; tail long and naked. Skull: 
superciliary ridge present and reaching to occiput; bulla with axes 
parallel to that of skull; width and depth equal, and no anterior 
prolongation; maxillary root of zygoma notched above; anterior open- 
ing of antorbital vacuity vertical; incisive foramina equal in width at 
Fic. 37. OTOTYLOMYS PHYLLOTIS. 
No. 1ro800s U. S. Nat. Mus. Coll. Enlarged %. 
UprpER TOOTH ROW LOWER TOOTH ROW 
Enlarged 7 times Enlarged 7 times. 
